bushnell



4 Sheets-S heet 1.

(N0 Model.)

N W. BUSHNELL.

I TRACTION ENGINE. No. 259,814. Patented June 20,1882.

(No Model.) 4 Sheets -Sheet 2. N. W. BUSHNELL.

1 v TRACTION ENGINE. No.259,8'14. Patented June-20,1882. J

(No Model.) 4 sheets-sheet a .N. W.. BUSHNELL.

I v TRACTION ENGINE. .No. 259,814. Patented June 20,1882.

J l llJ l lo I Irllv l lQI l lOl lO-O-O N. PETERS. PholnLithognphor. Washington. D. C.

4 Shets-Shet 4.

(No Model.)

N. 'W. BUSHNELL. TRAGTION ENGINE? I V No. 259,814. Patented June 20,1882.

UNITED STATES PATENT OFFICE.

NEWTON W. BUSHNELL, OF NINEVEH, NEW YORK.

TRACTION-ENGINE.

' SPECIFICATION forming" part of Letters latent No. 259,814,, dated June 20, 1882.

Application filed February 14, 1 882. (No model.)

being had to the accompanying drawings, and

to the letters of reference marked thereon, which form part of this specification.

This invention relates to what are denomi-- ated road or traction engines; and the nature of my improvement on such engines consists mainly in the construction of the driving and transporting wheels, whereby cogs or traction-teeth can be protruded or retracted from the rims thereof at the pleasure of the attendant.

When the machine is moving on macadamized roads, over bridges, and hard and level fields smooth-faced wheels are desirable; but when the machine is used for drawing heavy loads*as, for example, harvesters or plows in the field-itis necessaryto protrude cogs or spurs from the rims of the transporting-wheels to prevent them from slipping while drawing on loose or soft ground.

In the annexed drawings,Figure1 is avertical sectiontaken longitudinally through the new engine. Fig. 2- is a side elevation of the same. Fig. 3 is a vertical transverse section taken in the course of the dotted lines as no marked on Fig. 2. Fig. 4 is a side view, en-

larged, of one of the driving and transport ing wheels, indicating by dotted lines the traction-cogs protruded from the rim and by full traction-engine, which may he made in any suitable manner, and B B C designate the transportingwheels thereof. The two wheels B B are traction and'driving wheels, and the wheel 0, which supports the front of the frame A, is a guide, and it may be controlled by means of connecting-rods D, leading back to the engineers station, which I have indicated by the letter E.

F designates the steam-boiler; G, an oiltank; H H, steam-engines of the well-known kind, whose piston-rods connect with cranks a a on the axle G of the transporting-wheels by meansof pitman-rods b b.

On opposite sides of the engineers station water-tanks are arranged, and at the rear end of the frame 01'' platform A, I provide suitable means for coupling with'a harvester, a plow, or other implement. The axle of the front or guide-wheel, G, has its hearings in a furcated yoke, which is free to swivel in a gooseueck projecting from the front of frame A.

The boiler F is preferably composed of tubes inclosed within a boiler-iron case and heated by means of oil in a tank from which rise a number of wick tubes. A perforated diaphragm having tubular slides fixed to it is employed, which slides receive through them .the wick-tubes. The slides are vertically slotted and allow the use of set-screws, which'clamp the wicks after they have been properly adjusted. The said perforated diaphragm is vertically adjustable by means of knee-levers and a connecting-rod extending through the boilershell and pivoted to a hand-lever outside thereof. A segmentrack outside of the boiler may be employed for holding the said hand-lever at any desired point of adjustment.

An oil-feeder provided with a suitable cutoff will be connected to the tank Gr. It .will be seen that I use fluid fuel for the boiler and that I can regulate the intensity of the heat of the many flames by the adjustment of the single hand-lever.

Instead of the boiler above described any other suitable steam-generator may be used.

The driving and transporting wheels B B may be fixedon one axle, G; or they may be fixed on a centrally-divided axle, so that each wheel may turn independently of the other while turning curves. If the axle is centrally divided, a suitable clutching device will be used, by means of which the two sections of 5 the spokes K are conical, as indicated by the letter (Z. The rim L is perforated for the purpose of reciving freely through it cogs or traction-teeth N, as shown in the drawings. These teeth N are rigidly secured to segments P, and these segments are connected to the hub J' of the wheel by means of toggle-levers R. The levers R break joints atf, and their extremities are pivoted respectively to the hub J and to the segments P. The outer limbs of these toggle-levers It are rigidlyconnected to segments '1 of an internal ring, to which segments latertil projections g are fixed at suitable interva s.

I I designate angular reaches, which extend over each one of the wheels B, and which are formed on the extremities of horizontal transverse rods 1, movable in suitable guides beneath the frame A. The inner ends of the rods 1 ot' the reaches I are connected to toggles 1 to which a rod, M, is suitably pivoted, that is connected to a hand-lever, M, located in a position convenient to the engineer stationed on the platform E.

The two limbs of each one of the reaches I are provided with cams It It, which are ar ranged in such relation to the lateral projections 9 and the segments T of the inner ring that the engineer can cause either the outer can], It, or the inner cam, 7:, to be struck by said projections, the efl'ect of which would be to either retract the traction-teeth within the perimeter or tread of the rim L or to protrude them beyond the tread.

Between the segments P and the rim L of each wheel B springs S are coiled around the conical portions (1 of the spokes, which by their recoil aid in the retraction of the teeth N.

When the toggle l is moved in an angular position, so as to retract the reaches Ian (1 bring the cams it into play on the projections g of the segments T, the toggles R will be broken atf and springs S will aid in retracting the teeth Nwithin the peripheries of the wheels B.

When the teeth N are protruded beyond the rims of the wheels the jointsfot' the toggles R incline toward their respective spokes, so as to form a perfect lock, which can only be broken by adjusting the reaches I so that cams 70 will act on the inner portions of the projections g.

It will be seen from the above description that the attendant stationed at E can cause the teeth N of the driving and transporting wheels to be protruded or retracted at pleasure.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. The combination of the toothed segments P, the perforated rim L, through which the teeth pass, the toggles R, connected by the segments P to the hub J and to the segments '1, and means for protruding the teeth beyond the periphery of the rim and retracting the teeth, substantially as described.

2. In a traction or road engine, the reaches 1, provided with cams and atoggle-connection for extending the reaches, in combination with transporting-wheels having radially-movable traction'tceth adjustable by means of said cams, substantially as described.

3. The combination of the perforated rim L, the traction-teetl1N,tixed to radially-expansible segments P, the spokes K, having conical ends (I, the springs coiled around these ends, the segments T, provided with projections g, the toggles R, and the cams on the adjustable reaches 1, substantially as and for the purpose set forth.

In testimony that I claim the foregoing as my own I affix my signature in presence of two witnesses.

NEWTON \V. BUSHNELL.

Witnesses:

T. H. ALEXANDER, WM. R. KEYWORTII. 

